A PQ control strategy for voltage-controlled inverters applied in low-voltage power system
2014
Voltage-controlled inverters are grid-friendly and can cope with the high penetration caused by connecting a lot of distributed generations. In low voltage power systems This paper proposes a simple and precise PQ control strategy based on improved voltage-controlled inverters with inner output impedance. The PLL part is replaced by second order generalized integrator method and it performs well when frequency varies. The effectiveness of the proposed control strategy is validated by theoretical analysis and simulation results.
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